<template>
  <div class="auth-page">
    <div class="container page">
      <div class="row">
        <div class="col-md-6 offset-md-3 col-xs-12">
          <h1 class="text-xs-center">{{ isLogin ? 'Sign in' : 'Sign up'}}</h1>
          <p class="text-xs-center">
            <!-- <a href>Have an account?</a> -->
            <nuxt-link v-if="!isLogin" to="/login">Need an account?</nuxt-link>
            <nuxt-link v-if="isLogin" to="/register">Have an account?</nuxt-link>
          </p>

          <ul class="error-messages">
            <template v-for="( messages, field) in errors">
              <li v-for="( message, index ) in messages" :key="index">
                {{ field }} {{ message }}
              </li>
            </template>
          </ul>

          <form @submit.prevent="onSubmit">
            <fieldset class="form-group" v-if="!isLogin">
              <input v-model="user.username" class="form-control form-control-lg" type="text" placeholder="Your Name" required/>
            </fieldset>
            <fieldset class="form-group">
              <input v-model="user.email" class="form-control form-control-lg" type="text" placeholder="Email" required/>
            </fieldset>
            <fieldset class="form-group">
              <input v-model="user.password" class="form-control form-control-lg" type="password" placeholder="Password" required/>
            </fieldset>
            <button class="btn btn-lg btn-primary pull-xs-right">{{ isLogin ? 'Sign in' : 'Sign up'}}</button>
          </form>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { login, register } from '@/api/user'
// 仅在客户端加载 js-cookie 包
const Cookie = process.client ? require('js-cookie') : undefined
export default {
    middleware: 'notAuthenticated',
    name: 'loginOrRegister',
    computed: {
        isLogin () {
            return this.$route.name === 'login'
        }
    },
    data () {
      return {
        user: {
          username: '',
          email: '',
          password: ''
        },
        errors: {}
      }
    },
    methods: {
      async onSubmit () {
        try {
          const { data } = this.isLogin 
          ? await login({user: this.user})
          : await register({user: this.user})
          // 保存用户登录状态
          this.$store.commit('setUser', data.user)
          // 为了防止刷新页面丢失数据，将数据持久化存储到cookie
          Cookie.set('user', data.user)
          this.$router.push('/')
        } catch (err) {
          this.errors = err.response.data.errors
        }
      }
    }
};
</script>

<style>
</style>